87212202 has 72 divisors (see below), whose sum is σ = 220797024. Its totient is φ = 22479600.

The previous prime is 87212197. The next prime is 87212231. The reversal of 87212202 is 20221278.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 665677 + ... + 665807.

Almost surely, 2^87212202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87212202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110398512).

87212202 is an abundant number, since it is smaller than the sum of its proper divisors (133584822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87212202 is a wasteful number, since it uses less digits than its factorization.

87212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 87212202 is about 9338.7473464057. The cubic root of 87212202 is about 443.4647291134.

The spelling of 87212202 in words is "eighty-seven million, two hundred twelve thousand, two hundred two".